66404226 has 16 divisors (see below), whose sum is σ = 151781184. Its totient is φ = 18972624.

The previous prime is 66404207. The next prime is 66404257. The reversal of 66404226 is 62240466.

It is a junction number, because it is equal to n+sod(n) for n = 66404193 and 66404202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790485 + ... + 790568.

It is an arithmetic number, because the mean of its divisors is an integer number (9486324).

Almost surely, 2^66404226 is an apocalyptic number.

66404226 is an abundant number, since it is smaller than the sum of its proper divisors (85376958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66404226 is a wasteful number, since it uses less digits than its factorization.

66404226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581065.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 66404226 is about 8148.8788185860. The cubic root of 66404226 is about 404.9473609379.

The spelling of 66404226 in words is "sixty-six million, four hundred four thousand, two hundred twenty-six".